* ci(buildkite): prevent pre-exit hook on setup steps
Occasionally due to node issues the pre-exit hook for docker image cleanups can fail, causing the otherwise successful job to bail out. This change ignores the cleanup on setup steps.
* feat: build and distribute .deb packages
Creates .deb packages for distribution via GitHub releases and Buildkite builds for the following architectures:
* amd64
* armhf
* arm64
* fix: pkgver reference in debpackages.sh
* refactor: split deb packaging jobs and quote variables
* fix: pipeline upload for debpackages
* fix: depends_on key for debpackages
* fix: add depends_on: ~ for debpackages step
* fix: pre-artifact hook for debpackages
* fix: add .deb suffix in pre-artifact hook
* fix: variable reference in debhelper.sh
* refactor: silence wget output in debhelper.sh
* refactor: make build concurrency gate only depend_on docker builds
* refactor: make build concurrency gate also depend_on coverage build
* refactor: remove dependencies for build concurrency gate
